Nitesh Shetty 67b4110f8c blk: optimization for classic polling ...

This removes the dependency on interrupts to wake up task. Set task
state as TASK_RUNNING, if need_resched() returns true,
while polling for IO completion.
Earlier, polling task used to sleep, relying on interrupt to wake it up.
This made some IO take very long when interrupt-coalescing is enabled in
NVMe.

Reference:
http://lists.infradead.org/pipermail/linux-nvme/2018-February/015435.html

Changes since v2->v3:
	-using __set_current_state() instead of set_current_state()

Changes since v1->v2:
	-setting task state once in blk_poll, instead of multiple
callers.

Signed-off-by: Nitesh Shetty <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>

2018-02-13 09:12:04 -07:00

..

partitions

partitions/msdos: Unable to mount UFS 44bsd partitions

2018-01-10 09:12:16 -07:00

badblocks.c

badblocks: fix wrong return value in badblocks_set if badblocks are disabled

2017-11-03 11:29:50 -07:00

bfq-cgroup.c

block, bfq: put async queues for root bfq groups too

2018-01-09 08:45:25 -07:00

bfq-iosched.c

block, bfq: add requeue-request hook

2018-02-07 15:17:46 -07:00

bfq-iosched.h

block, bfq: limit sectors served with interactive weight raising

2018-01-18 08:21:37 -07:00

bfq-wf2q.c

block, bfq: limit sectors served with interactive weight raising

2018-01-18 08:21:37 -07:00

bio-integrity.c

block: Fix __bio_integrity_endio() documentation

2018-01-17 09:59:33 -07:00

bio.c

Merge branch 'for-4.16/block' of git://git.kernel.dk/linux-block

2018-01-29 11:51:49 -08:00

blk-cgroup.c

blkcg: add sanity check for blkcg policy operations

2017-11-04 12:31:15 -06:00

blk-core.c

block: Add should_fail_bio() for bpf error injection

2018-02-06 15:09:51 -07:00

blk-exec.c

blk-mq-sched: remove unused 'can_block' arg from blk_mq_sched_insert_request

2018-01-17 09:49:21 -07:00

blk-flush.c

blk-mq: don't allocate driver tag upfront for flush rq

2017-11-04 12:40:13 -06:00

blk-integrity.c

…

blk-ioc.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

blk-lib.c

block: add bdev_read_only() checks to common helpers

2018-01-18 12:57:19 -07:00

blk-map.c

Merge branch 'for-4.16/block' of git://git.kernel.dk/linux-block

2018-01-29 11:51:49 -08:00

blk-merge.c

blk-mq: fix discard merge with scheduler attached

2018-02-01 14:01:02 -07:00

blk-mq-cpumap.c

…

blk-mq-debugfs.c

blk-mq-debugfs: don't allow write on attributes with seq_operations set

2018-01-24 09:46:09 -07:00

blk-mq-debugfs.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

blk-mq-pci.c

…

blk-mq-rdma.c

…

blk-mq-sched.c

blk-mq-sched: Enable merging discard bio into request

2018-02-01 14:45:11 -07:00

blk-mq-sched.h

blk-mq-sched: remove unused 'can_block' arg from blk_mq_sched_insert_request

2018-01-17 09:49:21 -07:00

blk-mq-sysfs.c

block: properly protect the 'queue' kobj in blk_unregister_queue

2018-01-15 08:41:38 -07:00

blk-mq-tag.c

blk-mq: improve heavily contended tag case

2017-12-22 11:09:37 -07:00

blk-mq-tag.h

Merge branch 'for-4.15/block' of git://git.kernel.dk/linux-block

2017-11-14 15:32:19 -08:00

blk-mq-virtio.c

…

blk-mq.c

blk: optimization for classic polling

2018-02-13 09:12:04 -07:00

blk-mq.h

blk-mq: Rename blk_mq_request_direct_issue() into blk_mq_request_issue_directly()

2018-01-19 12:51:59 -07:00

blk-settings.c

block: remove __bio_kmap_atomic

2017-11-10 19:53:25 -07:00

blk-softirq.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

blk-stat.c

treewide: setup_timer() -> timer_setup()

2017-11-21 15:57:07 -08:00

blk-stat.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

blk-sysfs.c

block: Protect less code with sysfs_lock in blk_{un,}register_queue()

2018-01-18 12:54:44 -07:00

blk-tag.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

blk-throttle.c

Merge branch 'for-4.16/block' of git://git.kernel.dk/linux-block

2018-01-29 11:51:49 -08:00

blk-timeout.c

block: add accessors for setting/querying request deadline

2018-01-10 11:47:47 -07:00

blk-wbt.c

blk-wbt: account flush requests correctly

2018-02-06 14:14:03 -07:00

blk-wbt.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

blk-zoned.c

block: introduce zoned block devices zone write locking

2018-01-05 09:22:17 -07:00

blk.h

Merge branch 'for-4.16/block' of git://git.kernel.dk/linux-block

2018-01-29 11:51:49 -08:00

bounce.c

Merge branch 'for-4.16/block' of git://git.kernel.dk/linux-block

2018-01-29 11:51:49 -08:00

bsg-lib.c

block: Fix kernel-doc warnings reported when building with W=1

2018-01-09 11:15:17 -07:00

bsg.c

vfs: do bulk POLL* -> EPOLL* replacement

2018-02-11 14:34:03 -08:00

cfq-iosched.c

…

cmdline-parser.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

compat_ioctl.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

deadline-iosched.c

deadline-iosched: Introduce zone locking support

2018-01-05 09:22:17 -07:00

elevator.c

block: Document scheduler modification locking requirements

2018-01-18 12:54:42 -07:00

genhd.c

block: allow gendisk's request_queue registration to be deferred

2018-01-15 08:41:38 -07:00

ioctl.c

block: move CAP_SYS_ADMIN check in blkdev_roset()

2017-10-25 12:25:00 -06:00

ioprio.c

…

Kconfig

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

Kconfig.iosched

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

kyber-iosched.c

kyber: fix another domain token wait queue hang

2017-12-06 12:33:07 -07:00

Makefile

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

mq-deadline.c

mq-deadline: make it clear that __dd_dispatch_request() works on all hw queues

2018-01-06 09:23:11 -07:00

noop-iosched.c

…

opal_proto.h

…

partition-generic.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

scsi_ioctl.c

block: silently forbid sending any ioctl to a partition

2018-01-10 12:30:37 -07:00

sed-opal.c

…

t10-pi.c

…